NEW YORK -- Andre Agassi's upcoming autobiography contains an admission that he used crystal meth in 1997 and lied to tennis authorities when he failed a drug test -- a result that was thrown out after he said he "unwittingly" took the substance.

According to an excerpt of the autobiography posted on The Times of London website yesterday, the eight-time Grand Slam champion writes that he sent a letter to the ATP tour to explain the positive test, saying he accidentally drank from a soda spiked with meth by his assistant "Slim."

"Then I come to the central lie of the letter," Agassi writes. "I say that recently I drank accidentally from one of Slim's spiked sodas, unwittingly ingesting his drugs. I ask for understanding and leniency and hastily sign it: Sincerely.

"I feel ashamed, of course. I promise myself that this lie is the end of it. The ATP reviewed the case -- and threw it out."

The ATP did not immediately respond to a request for comment.

Agassi retired in 2006. Excerpts from his autobiography, which comes out Nov. 9, are being published this week in the London newspaper, as well as Sports Illustrated and People magazines

The shit they were throwing around on tv yesterday about this was disgusting.

Douche bag ET wanna be starlits with bags under thier eyes from being out doing coke all night sitting with a straight face and asking the US public if they should publicly devour Agassi for shit he did a decade ago.